<!DOCTYPE html>
<html lang='en'>
<head>
    <meta charset='UTF-8'>
    <meta http-equiv='X-UA-Compatible' content='IE=edge'>
    <meta name='viewport' content='width=device-width, initial-scale=1.0'>
    <title>Document</title>
    <script src='../vue.js'></script>
</head>
<body>
    <div id='app'>
        <button @click="isLogo=true">登入</button>
        <button @click="isLogo=false">注册</button><br>
        <form action="###" v-if="isLogo" key="bb">
            <input type="text">
            <input type="text">
        </form>
        <form action="###" v-else  key="aa">
            <input type="text">
            <input type="text">
        </form>
    </div>

    <script>
        Vue.config.productionTip = false;

        const vm = new Vue({
            el : '#app',
            data(){
                return {
                    isLogo:true
                }
            }
        })



    </script>
</body>
</html>
